Awesome. That worked. Thanks all.
On Aug 25, 4:14 pm, Malcolm Tredinnick <[EMAIL PROTECTED]> wrote: > On Mon, 2008-08-25 at 15:58 -0700, Chris Amico wrote: > > Changed the variable names to make it a little more readable. Method > > now returns "amount" (formerly "total"): > > > Class Item(models.Model): > > name = models.CharField(max_length=100) > > price = models.DecimalField(max_digits=9, decimal_places=2) > > quantity = models.IntegerField(default=1) > > total_cost = models.DecimalField(max_digits=12, > > decimal_places=2, > > blank=True, > > null=True, > > editable=False) > > > def calc_total(self): > > amount = (self.price * self.quantity) > > return amount > > > def save(self): > > self.total_cost = self.calc_total() > > super(Item, self).save() > > > Now I get a different error when I try to save an Item: > > > OperationalError at /admin/spending/item/add/ > > (1054, "Unknown column 'total_cost' in 'field list'") > > Your earlier model had a bug -- two things called total_cost. The second > thing with that name (the method) completely hid the first thing. It > wasn't just something that gave Karen a headache; it was a real bug. So > when you ran "syncdb", there was no field called total_cost because the > "total_cost" attribute was a method. Thus, you have added a new field to > the model now that you have removed the method. > > You'll either have to update the database table manually, or drop and > recreate that model's table (look at the sqlreset command for > django-admin.py). > > Regards, > Malcolm --~--~---------~--~----~------------~-------~--~----~ You received this message because you are subscribed to the Google Groups "Django users" group. To post to this group, send email to django-users@googlegroups.com To unsubscribe from this group, send email to [EMAIL PROTECTED] For more options, visit this group at http://groups.google.com/group/django-users?hl=en -~----------~----~----~----~------~----~------~--~---
